There has been much discussion in the past among those in racing paddocks as to what truly constitutes a great circuit. Is it the challenge of high-G corners, like Eau Rouge at Spa, or a section of quick right-left-right flicks as seen at Austin, or tight hairpins at the end of long straights as incorporated at Shanghai?
Theoretically, it could be a combination of all - creating a circuit that affords overtaking opportunities but also challenges the drivers. For example, Suzuka has many of these features and has often hosted great battles to decide the outcome of the world championship.
Sure, the infamous title showdowns are a natural byproduct of its regular berth towards the end of the season - but Suzuka is a favourite among the drivers and, although passing opportunities are restricted to a handful of corners, it makes the drivers work hard to get clear of a rival.